/Engine/Source/Runtime/MovieSceneTracks/Public/EntitySystem/Interrogation/MovieSceneInterrogationLinker.h
Indicate that consumers of this class require a reverse-lookup table for imported entities to be maintained such that the various FindEntity functions can be called. (Not enabled by default due to performance cost with high interrogation counts)
void TrackImportedEntities ( bool bInTrackImportedEntities )